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bcachefs device — Manage devices within a running `bcachefs` filesystem. More information: <https://bcachefs-docs.read

Submitted by: @import:tldr-pages·Mar 2, 2026·

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bcachefscommanddevicesclimanagebcachefs devicewithinrunning

linux

Problem

How to use the bcachefs device command: Manage devices within a running bcachefs filesystem. More information: <https://bcachefs-docs.readthedocs.io/en/latest/mgmt-devicemanagement.html>.

Solution

bcachefs device — Manage devices within a running bcachefs filesystem. More information: <https://bcachefs-docs.readthedocs.io/en/latest/mgmt-devicemanagement.html>.

Format and add a new device to an existing filesystem.:

sudo bcachefs device add --label {{group}}.{{name}} {{path/to/mountpoint}} {{path/to/device}}

Migrate data off a device to prepare for removal:

bcachefs device evacuate {{path/to/device}}

Permanently remove a device from a filesystem:

bcachefs device remove {{path/to/device}}

Code Snippets

Format and add a new device to an existing filesystem.

sudo bcachefs device add --label {{group}}.{{name}} {{path/to/mountpoint}} {{path/to/device}}

Migrate data off a device to prepare for removal

bcachefs device evacuate {{path/to/device}}

Permanently remove a device from a filesystem

bcachefs device remove {{path/to/device}}

Context

tldr-pages: linux/bcachefs device

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